Trooper Chong Soo Lim was killed when his patrol car was struck from behind as he a traffic stop on the Northwest Tollway. His squad car was rear-ended and burst into flames.

Trooper Lim stopped a car on I-90, near Hoffman Estates. He was sitting in his squad car when a pickup truck struck the rear of his vehicle and forced it into the automobile in front of him. The force of the collision caused the gas tank to explode and trapped Trooper Lim inside.

The driver of the pickup truck was arrested for DUI. He was later charged with manslaughter for Trooper Lim's death and sentenced to eight years in prison.

Born in South Korea, Trooper Lim patrolled District 3 in Chicago upon his graduation from the Academy. He transferred to the midnight shift in District 15, Oak Brook, just one month before his death. He is survived by his wife.

On June 5, 1996, District 15, Oak Brook dedicated its operations area in memory of Trooper Lim.